期刊
JOURNAL OF POWER SOURCES ADVANCES
卷 2, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.powera.2020.100009
关键词
Solid oxide fuel cells; Biogas; Combined heat and power; Efficiency; Waste water treatment; Circular economy
资金
- Fuel Cells and Hydrogen 2 Joint Undertaking [671470]
- European Union's Horizon 2020 research and innovation programme
- Hydrogen Europe
- Hydrogen Europe research
Solid oxide fuel cell systems (SOFCs) are able to convert biogas from e.g. waste water plants highly efficiently into electricity and heat. An efficiency study of industrial sized solid oxide fuel cell systems installed at a waste water treatment plant is presented. The site consist of a biogas cleaning unit, two Convion C50 SOFC systems and a heat recovery section. The electric and total efficiencies of the systems are analyzed as a function of the electric net power output. The two systems achieved consistently high electric (50-55%) and total (80-90%) efficiencies in an electric net power output range between 25 kW and 55 kW. The study also shows that the high system efficiencies are independent of the CH4 content in the biogas. The results indicate that fuel cell systems are able to perform power modulation according to the power demand, while achieving constant high efficiencies. This is a clear benefit in comparison to micro turbines and combustion engines which are normally used for converting biogas into electricity and heat.
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